Are those periscopes?
Immersible: A type of expat personality inhabiting the body of someone you might have once known, and though technically the body is recognizable, the person no longer is, because the person has completely adopted the surrounding culture.
Sometimes these people suffer a complete and permanent personality transplant and "go native".
Sometimes they turn out to be on a journey more like passing through an amusement park, get tired after a while, and either go "home", or go elsewhere.
So they can sort of return to who it was they used to be, with added spice, or become yet another alien inside the same, eerily familiar body, which takes in succession a third or fourth or fifth personality, depending on the latitude, language, longitude, and geography of the moment.